Stone press rolls



-1.'W. VEDDER. soNE mss nousy Patented Apr. 1s, 1922.

' port'between the rolls.

unie' STATES PATENT ortica JoHN WARREN vEDnER, or WORCESTER;` MASSACHUSETTS;

STONE BRESS YROLLS.l

To all whomitfmj/ con-cern.' r

Be it known that I, JOHN WARREN VED- Dian, a'ctizen of the United vStates of America, anda resident of Vorcester, Massachusetts,

have invented newlund useful Improvements :Stone "Press Rolls, which invention is fully set forth in the following specification. This invention relates to improvements yin jress-rolls for a er-makin0-macliines and Vmore particularly to stoney press-rolls'be- YJtween which the paperis passed after yleaving thecouch-rolls. Y. Y

g Heretofore stoneipress-rollsof theabove jcha'raeter. have beenmounted on metal shafts l5 andv secured thereto' by` cement and by vend collarsfffPress-rolls thus constructed' have 'the'seriousobjection of cracking 'when for any `cause their bearings become heated.

.The heat developed at the end supports of the shaft is conducted to the interior ofitlie rollcausing the stone toexpand and give way under the internal strains. Furthermore, by reason of the Weight of such rolls,

diiliculty ris experienced in properly adjusting them to avoidcrushing the newly formed sheet of paper as it passes with its felt sup- The primary object of this invention isfto provide e'ective'means for preventing-this,

in]urious action of heat on the stoneV 1nate- 'rialfot the 'rolls and ktof-lightenv the construction Whilefretaining the advantages of. the

'useof the Vst'one#surfacedlro'lls.

' A further `objectoitjlthey'inventionfis to improve the-manner of mounting 'the stone on its supportino' shaftandin securing thev shaitfto the stone. `The above andother objects will be more'jfullyexplained -in the go'l theV roll may'vary within'comparatively4 Vwide limits. I 'have found, for ,-eXJmPle, that the relation oi-V about l t'o'for the.

. roll lgives goodv results.- Tlietubularsliaft detailed description. 40.

lVith the above objectsin view,my.inven` tionV resides in mount'ing'thestone-which is to form the roll on a'tubularmetatshatt` rpreferably of forged steel, the vheat-radiatingfsurfaceof which is suiii'cient kto dissipate. to the air or otherfluid inv or passed through the hollow sliaft,the injurious ex- Cess of heat produced at the 'shaft bearings. The ends ot the tubular shaft may be open to the atmosphere or may bein communication with a Source of cooling fluid. Thev size of the tribular shaft in relation to that diameters otthertubular shaft and zstone ing the stoney on the shaft,

of which is described below. Ylefore mount-V either tapered or vstraight centering plugs,v but preferablyf Y ipeoification of Letters.IE'zritent.v Patented APL lsplgzg.. I Applicationfiledl January 12,1920.l Serial No. 35i),861 i A i i perforated, are inserted in the end openingsk f' of thefsliaft which is then supported Yina lathe and the Vend portionsare lturned-and threaded. Theflroll isfthenkV mounted onv the shaft yand subjected to' a vmachining'operaf tion.

of example, two constructional forms -of-the In. order that'the inventionmaybe Vmore Yreadily understood, reference is had t0y the accompanying drawings which show,l by wa y nventiongsuch drawings, however, are intended to assist the description and not-as defining the limits thereof. f

In .Said drawings a Fig Aliis a'viewof api'ess-rolh partlyin i longitudinal section and partly in side elevation, showing one embodiment of vmy iuvention and F ig. 2 is a similar "viewto YFig-'1showing ia modification.

.Referring .to F ig. l the. drawings, lis

a tubular metal shaftV preferablyconsisting oiaiforged steel tube, the ends of 'which are adapted .to'f receive centering plugs Q preterably tapering and"provid'ed with openings YB'otliends of' thefsliaft being alike, the

ldescription Will. beconfined to one-end only. i Mounted on shaft 1 is a stone `roll body 4:,"

the lcentral bore in which' terminates in` enlargedy opening 'here shown as flaring forms as straight shown in Fig. 2.V 6 is a or cone-shaped, though it may Aassumeother l shaft l and rolleby a forced-fit, butI pre'f- -V I 'erably provide :the shaftv With threads as shown and screw the bushinghome'on the on and fitting about the protrudingfend .of

the bushing andpreferab'ly having a; thread:

faces :thepen'df ther stone roll, ythe" flange cal end of the roll,thereby. taking someoji' the 4side stress Which'tends ,tocrack the bushj` ing and also the roll. The flange 7 inayfbe and preferablylis fastened in place by 'fa se-v iio curing pino-fwhi'ch two-are shown'ingyFig.

l; they notonlysecurejthefcollarV to the 9o.l 95 i 10o Shaft.' 7 lis ametal collar or Hang-e mounted and roll.

bushing against relative movement, but likewise secure the bushingto the shaft.

The roll as thus constructed is 4assembled by inserting the shaft l through the opening in the stone member with both ends of the shaft protruding beyond the stone body to constitute bearing members the exterior bearing surfaces of which are adapted to make rotatable engagementr with suitable l-supprnting bearing members not shown.

`Wedges or bushings 6 are slipped over ythe ends of the shaft and screwed to ar tight fit between the shaft and the stone, and then the collars 7 are placed in position against Vthe ends ofthe roll and secured on the ends of the roll and more particularly'from the bearing surfaces on the projecting ends of the shaft by means of the good heat conducting metal wall of 'the sha-ft and distributer'l to the interior surface of the 'shaft by which it is dissipated to 'the airer fluid within the hollow shaft. Thus, this heat is not permitted to accumulate andraise the temperature ofltlie stone', but `is,loy lreason of the construction, transferred to the air o-r other yfluid 'medium in the tube and :removed either by air convection currentsset up in the tube or vby passing a vcooling fluid through l'the hollow shaft. ln this lma nner 'the iends and other parts of the stone `are kept below' temperature Vwhich produces breaking stresses inthe stone. l flven 4with the pcifiorated `centeringplugsfin' yposition fthe benefits of cooling aire manifest.

lThe replacement of a solid forged steel shaft, as heretofore employed, by a'forged steel tube results in'materially reducing the Weight of the roll Without sacrificing strength and rigidity, thereby permittin g. the rdlls to be operated Without 'Crushing the paper. y

.By reason of the Wedgeconstruction as described, he stone is anadecfast'to the sha-ft by a close lit of the Wedge before applying 'the cupped flange or collar.

' In the 'constructionalforrn'*shown in Ffig. 2, the centred opening in the stone roll l is slightly larger than the -tubur-lar shaft l 'for he purpose 'fof receiving a. cementing lmaterial such asgroutingor other like material l0 which lills'the space between 'the shaft rlhe central 'opening in the stone yis enlarged vat each end to `receive 'cylii'idrical bushings which are' providedv with .iper- -forated flanged portions which may be integral with the bushing as shown or may be `ing, together separate therefrom as shown in the constructional forni, Fig. 1. Y f

Before placing the bushing in position, Wire 9 is preferably Wrapped aroundV the body portion of the bushing, leaving enough Wire iree Ito form a spiral Wrapping between the -ilangeportion of the bushing and the end of the stone roll. vThe Wire-Wrapped bushwith a suitable quantity of cement, is inserted over the shaft and placed in position in the enlarged opening of the roll, leaving a space between the flange portion of the bushing and the roll for receiving a fewturns of Wire and cement. The flanged bushing is inade fast to the-shaft by any suitable means, such as by a pin l2. To 'ensure that the cement space vmay be entirely filled,

Vcement for this purpose isL introduced through the perforations in the flange. It is found that the wire embedded in the ee- -ment assists in retaining the cement by preventing its disintegration, and also in strengthening the joint Vbetween the shaft and stone Where it is subject tothe greatest stress. One or more side `openings are preferably provided yin the rshaft for receiving porous plu-gs, such as wooden plugs 13, which `permit..moisture to vescape' from the cementand for preventing Aaccurnulation of vapor pressure in rthe cement space.

That I claim isr- Y :1. A press-roll comprising a stone surface portion having a 'centraljbord a tubular metal shaft the end portions .of which constitute bearings and the central portion of which is adapted to enter said bore, :said shaft having an internal heatdissipating surface Vadapted to dissipate heat generated in the roll bearings, said surface being in good heat transmitting relationship with said bearings entirely through material ofv iigoo'dhea-t conductivity, `and bushings pro vided with collars bearing against the endsof said stone portion. c

2.i press-roll comprising a stone surface portion having cone-shaped ends and a central bore with flaring endopenings,y .at-ubulair nieta-l shaft the end portionsof which n constitute roll bearings land the central vportion of which is adapted to enter said bore,

ksaid shaft- Vhaving a-n internal heat-dissipat- Aing surface adapted to dissipate heat gen- Aerated in said roll bearings, ,tapering bushings having threzrded engagement with said shaft and adapted to enter said flaring open ings, and cup-shaped retaining collars adapted to be secured to said bushings and lit over the conical ends of said stone portion. Y t t 3. ln a roll, the lcombination -of a stone body portion, a tubular` shaft secured to and extendinglongitudinally .through said stone body portion and by vreason 0f its tubularity vhaving an internal surface adapted to `dissipate heat, and a bearing member at'one or both ends of'said shaft adapted to make ro-V tatable engagement with a supporting bearing member and having its'b'earing surface in heatcommunicating relationship to v said internal surface of the shaft through a path of good` heat conductivity adapted to con* `duct heat from the bearing-*to said internal v`surface of the shaft.'

4. In av rollpthe Vcombination ofiaV stone fio body portion, a tubular shaft secured to and extending longitudinally.y through said stone body portion and by reason of its tubulalrity havingjan internal surface adapted toV dissipate heat, and a bearing member` at'one or both ends -of said .shaft adapted to make 'rotatable engagement .with a supporting bearing memberjand having itsbearing sur# face in heat communicating yrelationship .to

4 said internal surface of the shaft through an all vmetal path of 'good heat conductivity adapted to conduct heat from'the bearing to said internal surface of the shaft.v

5. In a roll, the combination off-'a stone body portion, a tubular shaft secured to and extending longitudinally through said stone body portion and projecting at one or both ends thereof with the surface-of said projecting shaftV end eonstitutinga bearingsurface adapted to rotate in engagement with a supportingbearing member andxsaid shaft by reason of its tubularity having an internal surface adapted to dissipate heat communicated thereto through the metal of the. shaft from theibearing surface at the end thereof. Y

6. VIn a roll, the combination` of a stone body portion having an axialboi'e, a tubular metal shaft extending through saidk axial bore and projecting at both ends of the stone body portion to constitute bearings on the roll vfor engagement With supporting bearings, means securing said body to said shaft7 and centering plugs in the ends of the tubular shaft for centering and Vsupporting the roll in the finishing ofthe surface, of its stone body,

7. 'In a roll, the combination vof v.a stone bodyportion having an axial borepa tubu-h lar metal shaft extending through said axial ,'boreand projecting atv both ends of ther stone body portionto constitute bearings on the rollv for engagement Withy supporting bearings, means securing said body to said shaft,k and perforated centering' plugs in the ends of the tubular shaft vfor centering'and K supportingy the roll in the .'nishing of the surface o fits stone' body.'

8. in a'rolhthe combination of a `stone body portion having a central bore, a'fsh'aft extending through said central bore,` and means securing said stone bodyto said shaft said means including,` at one or'botli ends .A of the rollfa bushingor sleeve on the Vshaft closely fitting Within the bore ofthe stone body at one end thereof, the outer end of means securing said stone body to said shaft 'said means'including, l'at onepriboth ends` of the roll, afbushing or sleeveonk theshaft v face ofthe stone-body, anda separately formed; annular collar` fitting about andse-` closely fitting'ivithin the bore vof the stone; r4body atone end thereof, ther` outer end iof said bushing projecting beyondlthe end sur-' cured on' said projecting Avend ofthe bushing and having a dished surface'for engagement, VWitha corresponding si'ifacefon the end/of Y the stone body, said collar being adapted-tov 'be' thuspo'sti'onjed after the bushing has i.

been properly positioned-With referenceito Y .l Y

ya lstoneV body portion having 'af central bore,'ia shaft `extending through said centralibore, andthe stonefbody n lO.` In a roll, the combination `of means securing j said stone body-to said vshaft said means' including, ations or both ends of theroll, an exteriorlytapering bushing or sleeeve ron the shaftclosely tting vwithin;tliesiinilarly shaped bore "of the stone body at one end ofthe latter,`the outer end' i of said bushing projectingbeyond `the end surface of the stone body, and an annular collar 'fitting and secured on said end ofthe bushing. i

fll. In aroll, the combination of'a stone body portion havinga central bore, a shaft extending `through said central bore, and means securing said stone-body to said shaft projecting said lmeans including, atene or both ends of theroll, Va bushing or 4s leeve inscreW-threadved engagement With the shaftand? closely fitting Within the bore of the stone body at one end thereof the outer endlof said bush ing projectingbeyond theend surface Y of the.' stonebodyyand an annulaifcollar fitting and.

secured on j said .projecting endy of the'biisli- 12in a roll',thecombination of a stone -body portion having a central bore, a shaft ilo extending `through 'said central bore, and". i

means securing said stone body to said shaft 1.20. saidy means including, at one or bothends of j the roll` a bushing or sleeve in screw-threaded engagement with the shaft and closely fit- 7.', ting within the bore of the .stone body at one gf end thereof the outerfend of said bushing projecting vbeyond the end surfacefof the Vstone body. and. an annular collar in screiv- Vwith said projecting threaded engagement end of tlieibushing.

13. ln'a roll,y they combination of a stone bodv ortion having a central bore a shaft extending through said central bore7 and means securing said stone body to said shaft said means including, at one or both ends of the roll7 an exteriorly tapering bushing or sleeeve in sereyvthreaded engagement with ,the shaft and closely littingivithin the similarly shaped bore of the stone body at one end thereof. the outerend o said bushing projecting beyond the end surface of the -stone body, and an annular Collar making sereW-tlneadedengagement with the .projecting end ot said bushing and having a dished 'face 'for engagement with a Corresponding surface on the end of the stone body.

15. In a roll, the combination of a stone body portion haring a central bore7 a shaft extending through said central bore, and means securing said stone body to said shaft said means including, at one or both ends of the rolL a bushing o-r sleeve on the shalt closely fitting within the bore of the stone body at one end thereof, the outer end ot said bushing projecting beyond the end surface ot the stone body:7 an annular collar litting the bushing, a' pin engaging registering openings in the bushing and shaft to rsecure the same against relative movement7 and a pin engaging registering openings in the collar and bushing to seeurethe same against relative movement.

ln testimony whereof I specification.

JOHN VARREN VEDDER.

have signed this and secured on said projecting-end ot" 

